Shrewsbury, Massachusetts has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 38.7 °F (low) to 58.5 °F (high). Annual precipitation averages 49.2 Inches. Shrewsbury is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around Apr. 11 - Apr. 20 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 15.9 °F | 33.9 °F | 3.76 in. |
| February | 17.3 °F | 36.6 °F | 3.29 in. |
| March | 25.1 °F | 44.2 °F | 4.51 in. |
| April | 35.7 °F | 57.1 °F | 4.27 in. |
| May | 46.6 °F | 67.9 °F | 3.59 in. |
| June | 55.9 °F | 76.1 °F | 4.2 in. |
| July | 61.6 °F | 81.5 °F | 3.9 in. |
| August | 60.0 °F | 80.0 °F | 4.25 in. |
| September | 52.1 °F | 73.3 °F | 4.02 in. |
| October | 40.7 °F | 61.2 °F | 5.01 in. |
| November | 31.0 °F | 50.1 °F | 3.82 in. |
| December | 22.5 °F | 39.6 °F | 4.57 in. |
| Annual | 38.7 °F | 58.5 °F | 49.19 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 6a : -10°F to -5°F |
| Plant Hardiness Zone - 2012 | Zone 6a : -10°F to -5°F |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |